Bachmann Releases Doctor's Note on Migraines as Pawlenty Says Candidates Must Be Able 'To Do All of the Job, All of the Time' July 20, 2011 4:12 PM ABC News' Matthew Jaffe (@matthewbjaffe) reports from Indianola, Iowa: When Republican presidential candidates Michele Bachmann and Tim Pawlenty descended on Iowa today, both faced questions about whether or not Bachmann's migraines would impede her from doing the job of president. Meanwhile, Bachmann issued a letter from the Attending Physician of the U.S. Congress arguing that Bachmann's migraines occur "infrequently and have known trigger factors of which you are aware and know how...